Concrete-mixer.



PATBNTED NOV. 12. i907.

A. W. RANSOME.

CONCRETE MIXER.

mum-n10; 1:

.E.) NOV. 17. 1906.

2 SHEETS-SHEET 1.

noulfoz wimaoeo PATENTED NOV. 12. 1907.

A. W. RANSOME.

CONCRETE MIXER. nrmcnrori mum NOV.17.1905.

M m U m 2 SHEETS-SHEET 2.

ARTHUR W. RANSCME, OF NEW YORK, N. Y.

CON CRETE-MIXER.

Specification of Letters Patent.

Patented Nov. 12, 1907.

Application filed November 17.1906. Burial 80. 3431821.

To all whom i! only ronrcm:

Be it known that I, Air-runs W. RANBOXE, of the borough of Richmond. inthe city of New York, Stat:- of New York, have invented ccrtain new anduseful lmprovcments in (oncrem-Mixers, of which the following is sfull,clear, and exact specification, such as will enable others skilled inthe art to which it oppertains to make and use the same. I

My invention relates to certain improvements in zipparatus for mixingconcrete and other granular malerinl. It relates generally, to thatclass of apparatus in which a rotary drum is adapted to receive thematerials to be mixed and which drum is provided intcriorly with liftingflanges or other mixing members, the material to be mixed, being chargedinto the drum and discharged therefrom when the mixing operation iscomplete. 1

The invention relates particularly to improvements in the rotary mixerforming the subject matter of the ,piror patent to Ernest L. ltansome,No. 814,803, dated larch 33, 1905. I

Heremfore drums were provided with a number of flanges extendingobliqucly across their interiors and abutting closely against thedischarge ends or'heads of the drums. Crossing these flanges were anumber of opposing or return flanges which engage the inner edges of theadvancing or lifting flanges and which are designed to set up a countcrmovement of the material in the drum, effecting thereby a thoroughadmixture. In the practical operation of such mixers it was found thatthe flanges or bafllcs abutting snugly agaisnt the heads of the drumfornu-d corners of cavities in which there was a tendency of theconcrete to accumulate and harden and thus, to some extent clog themachinc and intcrfcr'e with its cffcctive operation. it has also liccnfound that the crossing or rclurn flanges, being extended across theinncr edges of the main or advanw ing flanges, retain but a minorportion of the material falling upon them and do not return the materialtoward the receiving end suflicicntly to prevcntaccumulation of thcmatcrinl at the discharge end. This accumulation has, in some classcs ofwork bccn found [n be disadvanwgcous. H. has further been dowel-11ml inthe practical op -mlion of thc mix is ln-rcloforc coni-trnch-d, that thecrossing or rcfuro flang s, bcing cnganged with lluimu-r cdgcs of themain or advancing flange-s, arc not lash-nod in phu-c with ubmlulcsccurily and require much nrc to he I'Xl'l'lirll'll to pri-vcm. icidcnlnl dislmlgmcnl. l".trthcr fhc bhnlc amine cmcnf.

ally in the art of mixers of the class to which the invention relatcs.In attaining this end, I rearrange the flanges in such a way as to admitof a thorough and unrestrained circulation, through and around theflanges, of the water which forms a part of the material within thedrum. This water, being by my improved construction, permitted to washin and out of the various crevices or corners clearing them of theaccumulated concrete and preventing the clogging referred to. Furthe! bythus allowing the water unrestrained flow in the drum I avoid splashingof the plastic or semi-plastic material through the openings in thedrum. 1 also, by the above referred to rearrangement avoid the neccssity of placing the return flanges against the inner edges of theadvancing or main flanges, but, on the contrary, locate said returnflanges, directly against the inner wall of the drum alternately betweenthe main or advancing flanges, securingthereby the double advantage ofeffectual return of the material and, therefore, effectual mixing and ofeasily, firmly and i'emovably securing the flanges in place against thewalls of the drum. This enables me not only to securely fasten theflanges but to remove them easily for repair or otherwise.

My invention involves various other features of major or minorimportance and all will be fully set forth hereinafter and particularlypointed out in the claims. I

Reference is now had to thc accompanying drawings which illustrate as anexample one method of practicall y cndxldying the idea of meansconstituting my invention in which drawings Figure l is a view lookinginto the receiving end of a mixing drum to which my invention has beenap plied; Fig. 2 is a sectional view of thc same on the line 2-- 2 ofFig. I; Fig. 3 isa perspective view of one of the main or :ulvancingflanges; Fig. 4 is a plan view of one of the return flanges and Fig. 5is a diagram showing a section of the inh-riorof the drum supposed in bespread out in a flat plain: and illustrating, by broken lines and arrowheads, the course of the water circulating through the drum tocffcct'thc wrwhinganrl non-splashing action hcrcinlu-fore nwntioncd.

in rcgard tothe drawings I would here cxplain that 1 ha W, in theinterest of rdcarnem and illustration shown in Figs. 1 and 2, only thedrum and its flanges in which rrsidc thc \sscnfial lcalurcs of mypmscnl. invention.

In prim-lice, as will be undersumd fromlhe prior ut particularly fromthe prior patent hercinbefore menprcviously cmploy d indu t-d splashinglo a mnsidcrtioncd that the drum is mounted to turn in a suitable abldcgnwilh thc n-snltthal thc hcnringsof llndrum base, rind in combinedwith mechanism Iorimparting to wcricloggml and thc exterior of lhcnutchin covered it its rotating movement. As will also he undcrstmdwill: umlcrinl lhruwn from the drum. from the prior art, the material ischarged into the drum My or scnt invention, lln-rcfol has f .r itsprincipal through one end and discharged from the drum through objectsto nvcrconl tln-sc '||ccifit' disiulvantagcs, and theothcr. In Fig.2anarrow at indicates the direction at tiresome timet effect nmterialimprovements generin which the material is charged into the left handreceiving end of the drum and in said view the broken I engagement.

lines 1) indicate the usual discharge chute by means of which thematerial is carried from the drum in the direction indicated by thearrow c. This discharge chute is usually hung on a pivot and may betilted reversely to the position Indicated in Fig. 2 to delay dischargeof the material until the mixing action is compl te.

All

of these things are fully set forth in the prior patent mentioned andconstitute no part of my present invention.

10 indicates the main or advancing flanges.- Any number of these may beprovided according to the nature of the mixer; in the type of machinelltlt' illustrated these main or advancing flanges arc six in numher,and they are arranged with their outer edges snugly against the innersurface of the drum, and extend for the major portion of their lengthdiagonally across the same. At the receiving head of the drum, theflanges 10 are provided at their extremiti s with lips 10 and these arefastened by bolts 15 or otherwise. to the receiving head of the drum. Ata point adjacent to the discharge end, the flanges are shaped withoffset or inter- Vally disposed portions 10", which form liftingpockets.

facing the direction of rotation of the drum (see the diagram Fig 5 inwhich the arrow d indicates the direction of rotation) and serving tolift the material with the rotation of the drum and drop the same in tothe discharge chute b, when said chute is in position indicated in Fig,2. Said advancing flanges 10. however, instead of extending directly toand contacting with the discharge head of the drum, terminateshort ofthe same, leaving between the dischargeend of the flange and thecorresponding head of the drum 9. space or passage 11. To hold thedischarge ends of the flanges 1t securely in place,.I pro de Z-brackets12 which are fastened by bolts 15 or otherwise to the discharge ends ofthe flanges and to the discharge head of the drum. Said brackets,however, are relatively narrow and do not materially obstruct the abovementioned passage 11. I further form the flanges 10 with an opening oropenings 19 directly adjacent to the receiving head of the machine andclose to the side walls of the drum. As will be observed from Figs. 1and 3 the main or advancing flanges .10 are shown as of uniform width.This construction I prefer to employ since it insures-a uniform advanceof r the material from the receiving to the discharge end The advancingflanges are fastened to the side walls of the drum by U-bolts 16 whichembrace the flanges and pass through the drum walls. By theseitistenings 15 and 16 the flanges are securely held in place and may yetbe removed easily mod it will for repair or other- 14 indicates the orsecondary flanges. These are provided with lips 14 which are removabl yfasby bolts 15 or otherwise against-the inner side cf the dischargeheadcl the drum and as shown in the drawings, these flanges 14 extendalong and are redovably fastened by U-bolts 16 to the inner surface ofthe drum, the flanges projecting in a direction reverse to the directiorin which the advancing flanges 10 extend. Furthenlhe return flanges 14are arranged at ternately between the advancing and out of contact 1therewith, both the advancing and return flanges bein engaged with theside walls'nnd heads of the. rum and 66 being held in place by thefastenings at such points of The return flanges are preferably formedwith their inner edges tapering toward the receiving cud oi the drum.This marginal form is illustrated clearly in Fig. l. The return flangesextend from the discharge end, inward ton-ard the receiving end andterminated at approximately thc middle of the drum. Said return flangesarc located at equidistant points between the advancing flanges. Theinner ends of the return ilungts terminate short of the advancingflanges, to leave a spot-e through which the water, concrete, etc., maypass freely as they slide along the advancing flanges. The returnflanges are provided with an openin; or openings 14 in the comersbetween the discharge head and the sides of the drum, which openingsserve to allow a thorough circulation of water, as will be hereinafterfully explained.

ln the use of my invention the material to be mixed. is charged into thereceiving end of the drum,-the discharge chute is turned to reverseposition, (op'posite that indicated in Fig. 2) the 'drum is rotated mixthe material and when this operation in comlottthe discharge chute isreturned to its operative position indimted in Fig. 2, and the materialin the drum is raised by the flanges and discharged from the pockets l0into and from the chute b, all of which will be fully understood. x

Upon the rotation of the drum, the material within the same is picked upby the advancing flanges 10 and, owing to the inclination of theseflanges, as the flanges rise the material slides down on the flangestoward the discharge end and is then caught in the pockets if). Astheflanges continue to rise with the rotation of the edges of the flangesl0 and is caught in-part by the drum, the material slides over the;

return flanges 14. this operation being assisted by the relativelyincreased width of said flanges 14'. Tho' material received by thereturn flanges is, owing to the position of the same, conveyed with therotation of the drum downward toward the receiving end and is finallydischarged from the inner ends of the return flanges partly upon theadvancing flanges and partly" dumped down into the bottom of the drumwhere it p is reengaged by the advance flanges. It will thus appear thatthe construction which I have provided;

sets up, upon the rotation of the drum, an active countermoverpent ofthe material bringing about t thorough admixture thereof. By locatingthe return flanges intermediate theadipnce flanges, I increase theeffectiveness of operation of the return flanges; carrying back towardthe receiving end a larger quarttity of material than heretofore andpreventing-onobjectionable accumulation of material at the dischargeend. Further, 1 am enabled more securely ,yet rcntovably to fasten theflanges in place and thus increase the life and durability of themachine. and fadililate repair. This armngement of the flanges alsocontributes to the non-splashing effect by causing the rctuni flanges todeliver the material principally on the advancing flanges rather thantotlrrow this 'rnaterinl violently into the bottom of the. drum.

furlhcr important function of the new construction which I prmridc, isthe thorough circulation of watt; which i f: prevents 't'ntau-uotuigtiun of concrete in thrt-rmlt't's and corners and consequentclogging of the machine and also pix-vents lplashifig from the drum. Ashereinbefore intimated. a common disadvantage of this (.iuSS of machinesis the accumulation and setting of the concrete in the crevices andcorners thereof, to such an extent that the operation of the machine isseriously interfered with.

It will be understood that in all concrete mixtures a certain quantityof water is pr sen and I take advantage of this condition and cause thewat r to wash out the accumulations mentioned. This washing action ispossible in my invention. owing to the peculiar arrangement of theflanges and is illustrated diagrammatically in Fig. 5. In thisdiagraimoalical view the arrow 11 indicates the direction of rotation ofthe drum and the relative positions of the plates or flanges are clearlyshown. The water in flowing openings 10'. the rest of th water whi hngngcs the advancing flanges at this point. running down along theflanges and meeting the stream delivered from the flanges 14. Ittherefore, clearly app ars that the new onstruction which I haveprovided distributes the water completely over the various partswithinthe drum and causes this water to flew through the crevices or cornersbetween the flanges and the Wulls oi the drum, in which cornersquantities of cement would otherwise be permitted to accumulate and inaccumulating would tend to clog the machin Also by giving the water aclear passage splashing is prw vented.

Having thus specifically described the pref rred embodiment of myinvention what 1 claim as new 5. A rotary drum mixer. having advancingand returnflanges, both engaging the inner walls of the drum andextending diagennliy from the respective end portions of the drum,towards the opposite ends thereof, lhe dvuncing linngo clearing theinner end of the return flange and iPillZlr ing beyond the samesuhstuntlally to the opposit or discharge end of the drum and m ans [orremovahl; curing the flanges to the side walls of the drum.

6. A rotary drum mixer, having udvunuing and return flanges, imhengaging the inn r wa ls of the drum and extending diagonally from therespective end portions of the drum, townrds the opposite ends thereof,the ndvtmclng flange ci -tiring the inner end of the return flange andreaching beyond the some substantially to the opposite or discharge endof the drum, and provided thcrem with an oil'- sci or bend extendingtoward the return flange and forming a lifting pocket.

7. A rotary drum mixer for concrete and slmllur \vcl plustlc materials,having a relatively stationary mixing iinnge in the drum lying in aplane snhstnnthilly rndlnl ol' the tonne and forming a (.Olill'l' orcrevice with on end \\:iii of the same, the mixer having it pussnge atsaid corner or crevice allowing the clrculntion of water through saidornerto prevent accumulations of concrete therein.

8. A rotary drum mixer for concrete and similar wet plastic materials,having a relatively stationary diagonal mixing flange in the drum in aradial plane them-f and with one end oi the llunge juxtaposed andsecured to, lrit spliced from the corresmndlng end'ut the drum, to allowclr ulnlion of water past the said end of the [hinge and preventaccumulations of concrete between said end of the flun'ge and the end ofthe drum.

t). rotary drum mixer for (:oncroll: and similar wet i plasticmaterials, having a diagonal mixing thinge in the drum with one endjuxtuposed to, but spaced from the corresponding cud oi the drum toallow irculation of water t the said end of the ilungtand preventaccumulations of concrete at this pnilll, and u hrncket spanning thenpncc hotweeu said ends of the flange and drum and fastened to suid endsof the flange and drum to hold the ilungt: in

place.

it). A rotury drum mixer for concrete and similar wet plastic matcrinls,having 11 diagonal mixing flange in the drum with a lifting pocket atone end. said pocket being I juxtaposed to, but spaced from the udjnccntend of the drum to allow circulation of water lmtweon the pocket and theend of the drum and prevent. accumulations of concrete 1 at this point.

and desire to secure by Lett rs Patent; of the United States is:

1. A rotary drum mixer, hnvlng advanclngflnnges in the druid extendingsubstantially from end to end thereof, and return flanges engaging theinner walls of the drum his tween the advancing flanges and extendingfrom the discharge end of the drum toward, hut terminating short of thereceiving end.

A rotary drum mlxcr, having interior advan ing flanges in the drumextending substantially from end to end thereof, said flanges engagingthe walls or the drum and int rior return flanges en aging the wnlis ofthe drum between the advnnclng linngcs and extending from the dlschargeend of the drum toward, hutiterminnllng short or llu: receiving end.tin! return lhingcs Luring gr olcr width than the advancing flanges andtnpot'ing from the dlsehnrg lug toward the hemivlng cud o! the drum.

2!. A rotary drum mind-{having advancing and return flang s, iii thedrum extending along the lnm-r walls ding onnliy respectiv ly from theend pol-lions of the drum, tovt'nrds line opposite ends thereof, theadvancing thin i- Hearing the inner and of the return flange Indrem-hing heyond the same. suhstnnllnlly to the opposite or disclturglendof the drum.

4. A rotary drum mix r, hnvlng advnnciuz: and return iiungI-s. In thedrum extending along the inner walls diagonally n-s ns-tively from theend portions of tho drum to wards the oppositiends thereof, thendvuncing llnugo cheat" in: the inm-r and of the relurn ihmgc nnd' chin;beyond ihe runnesubstantially to the opposite or' discharge cm! of thedrum and formed thereut with n lilting pocket.

11. A rotary drum mixer for concrete and similar wet plustlt: materialshaving a. mixing linngc with its nd jnxtu osed to, but spaced from out:end of the drum to allow circulation of wall-:- past the said end of theflange, and a second mixing llnngo projecting from said end of the drumand having at passage through ll adjacent in fluid end.

12. .l rotary drum mixer for concrete and similar plnstit: materials,having a mixing llnnge extending dingonaily from one end oi th drum loat point :uljucont lo the other end. the lll-sl end of the flangehaving-a pnssnge lhrough it and the second end of the flange beingformed with a lifting pocket spliced from the adjacent end of me drum toform n pllfirlilgl: b tween it and the drum.

lit. rolnrv drum mixer for concrete and similar we phmllc tu:tt""inl-=,having :1 dingonul mixing flnngc. with a lifting pocket ul one end. saidpocket being juxtaposed to but spucod from the adjacent and of the. drumfor the purpose. specified, nnd a bracket. spanning linspace betweenflu: Illllng pockef and the end of the drum and pot-km and to the saidend of the drum to hold the lifting pocket. in place.

14. rotary drum mixer. having advancing and return flanges, bothclinging the inner walls of the drum and extending diagonally from flu:res ns-live end portions of the drum, towards the opposite. endstiter-ml, the advancing flange clearing the inner end of the returnflange and reaching beyond the same sulmtnntinlly to the opposite ordischurgv. end of the drum and formed therein with I lifting pocket.spaced from the adjacent end 0! the drum to provide it washing pusslg f"15. A rotary drum mixer, huvirig adv-":cing and return flanges, bothengaging the inner walls of the drum and extending diagnnally from therespective end portions of the-drum, towards the opposite ends thereof,the advancing flange clearinghe inner end of the return flange andreaching beyond the same substantially to the opposite or discharge endof the drum and formed thercat with a lifting pocket spaced from thendjacent end of the drum to provide a washing passage, the return flangebeing perforated adjncent to the discharging cml of the drum and theadvancing flanges being perforated adjacent to the 16. in n concretemixer, a rotary, drum hitting Ii flange secured to its inner wnlhnndextending therein/m in substantinlly a radial direction, said flangeluring one and connected to an end wall of the drum and providedndjncent thereto with anropening for the passage 01 water.

17. A total; drum mixer having a plurality oi. diagonal advancingflanges in the drum :extending substantially parallel and substantiallyfrom end to end of the drum, each flange having at the discharge end ofthe drum n lateral oifset forminga lifting pocket, all of such pocketsfacing alike the direction oi rotation of the drum and ends of theflanges adjacent to the ends r: heads 0! the drum, such passagesallowing the circulation of water substnni'lniiy as described to preventaccumulations of cuncreie in the drum in testimony whereof have signedmy name to thispecificaiitm in the presence of two subscribingwituessel.

ARTHUR W. RANSOME.

'itneuses

